ESA has been collecting and processing EO data from ESA missions (for example ERS-1/2, Envisat), and ESA TPM (for example AVHRR, Landsat, ALOS) for nearly three decades. To facilitate the various end-user and science applications, there is a need for the agency to support and maintain the quality aspects across missions with similar sensors. The SPPA team multi-sensor activities focus primarily on the sensor Fundamental Data Records (FDR), i.e. the level-1 data, on the instrument's core products, as outlined in the Mission Requirements Documents (MRD) of each mission, and on some select additional geophysical parameters that facilitate the improvements of the sensor FDR.